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How to plot a function

3 次查看（过去 30 天）
Nouha Amine
Nouha Amine 2022-5-25
评论： Sam Chak 2022-5-25
Hello,
I need to plot a graph with
where x is between and ,
y is here between and ,
Can you help me with it?
Thanks

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采纳的回答

Sam Chak
Sam Chak 2022-5-25
@Nouha Amine
You can do something like this:
x = 0.1:0.01:10;
y1 = x.^(-2.9-0.1);
y2 = x.^(-2.9+0.1);
plot(x, y1, x, y2)
ylim([1e-8 1e0])
xlabel('x')
ylabel('y')
  2 个评论
Nouha Amine
Nouha Amine 2022-5-25
When I copied this code,
The figure didn't show up,
What is the problem with that
Sam Chak
Sam Chak 2022-5-25
That's strange... I've tested the code on both MATLAB and Octave. Try adding this:
clear all
close all
x = 0.1:0.01:10;
y1 = x.^(-2.9-0.1);
y2 = x.^(-2.9+0.1);
plot(x, y1, x, y2)
ylim([1e-8 1e0])
xlabel('x')
ylabel('y')
grid on

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更多回答（1 个）

Fabio Freschi
Fabio Freschi 2022-5-25
Ran in:
You may use fplot
figure, hold on
fplot(@(x)x.^-3,[1 1e5])
fplot(@(x)x.^-2.8,[1 1e5])
% use bi-logaritmic scale
set(gca,'YScale','log','xScale','log')

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